TB 9-4920-451-24
b. Adjustments
(1) Adjust R58 (fig. 2) for a reading of 0.1000 M on digital indication.
(2) Adjust R64 (fig. 2) for a reading of 0.9500 M.
17. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
CALIBRATION PROCESS FOR CONSOLIDATED AIRBORNE SYSTEMS, MODELS
TF20-1 AND TF579
18. Preliminary Instructions
a. The instructions outlined in paragraphs 18 and 19 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
19. Equipment Setup
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Remove top protective cover as required for adjustments.
b. Connect autotransformer to 115 V, 400 Hz source and adjust for 115 V.
c. Connect TI to autotransformer using cables supplied with TI.
d. Set POWER ON/OFF switch to on and allow at least 30 minutes for warm-up and
stabilization.